Skip to content

Swan Police Frequencies

We do not have frequencies listed specifically for Swan in Warren County, Illinois yet. Countywide channels for Warren County that may also cover this area are shown below when we have them. The closest trunked radio site we have is Macomb (STARCOM21 Statewide Illinois), about 14 miles away.

About Swan Police Frequencies

  • 2 conventional channels are analog FM, so any scanner can receive them. Enter the frequency and set the tone shown in the table.
  • Trunked radio systems that carry law-enforcement traffic here: STARCOM21 Statewide Illinois: 2 talkgroups. A trunking scanner is required, and it must support the system type shown.
  • To follow a trunked system, program a control channel first. For Swan, start with the Macomb site of STARCOM21 Statewide Illinois, about 14 miles away. Its control channels: 851.9625, 852.4875, 853.325 MHz.

Warren County channels that also cover Swan

Dispatch

AgencyDescriptionFrequency (MHz)ToneModeFCC
Warren County Government OldWarren County Government – Dispatch460.2000
In 465.2000
186.2 PLFMNKSA911

Tactical

AgencyDescriptionFrequency (MHz)ToneModeFCC
Warren County Government OldCar-to-Car154.8750FMN—

STARCOM21 Statewide Illinois

AgencyDescriptionTalkgroupHexMode
Warren County SheriffWarren County Sheriff – Dispatch557615c8D
Warren County SheriffWarren County Sheriff – Tactical Channel557715c9D

Nearest trunked radio sites

Distances are measured from the center of Swan.

Macomb · STARCOM21 Statewide Illinois
RFSS 2 · Site 24 (hex 18) · NAC 14E · about 14 mi away
Control 851.9625, 852.4875, 853.325
Voice 851.4375, 853.9, 855.6625
Monmouth · STARCOM21 Statewide Illinois
RFSS 2 · Site 21 (hex 15) · NAC 140 · about 15 mi away
Control 853.35, 853.925, 855.2125
Voice 852.825, 855.3875
Blyton · STARCOM21 Statewide Illinois
RFSS 2 · Site 22 (hex 16) · NAC 14F · about 19 mi away
Control 852.3875, 852.9125, 853.4375
Voice 851.8625
What do these numbers mean?
Control channel
The frequency your scanner listens to first. It tells the scanner where each voice call is happening, so program it before anything else.
Voice
The other frequencies the site uses for calls. A trunking scanner follows them automatically once it has the control channel.
Site
One tower location of the system. Scanners show the number in decimal or hex, so both are listed.
RFSS (Radio Frequency Sub-System)
A group of sites run by the same controller. Large Project 25 systems can have several.
NAC (Network Access Code)
A hex code the site transmits. Your scanner can use it to ignore other systems on the same frequency.
Talkgroup
A virtual channel on a trunked system, such as one agency’s dispatch. Programming uses the decimal or hex number, depending on your scanner.